When It Works Best (And When It Won’t)
✅ Your odds improve if:
→ The envelope uses classic lick-and-seal adhesive (matte finish, not glossy tape-strip)
→ It was sealed recently (within 24–48 hours)
→ You applied just enough moisture—not a soggy drench
→ The paper is substantial (not tissue-thin or foil-like)
❌ It likely won’t work if:
